I had some success with that few years ago, now things got different, you will face two major problems, first with getting indexed and getting search engines traffic with that video content specialty google, second you'll mostly get low adsense clicks if you're planing to monetize with adsense. but still depend on how you will promote them .. .
you can use auto posting video plugins, some of them are shared here, find targeted and good users/channels to post from .